Rotary kiln and cooler



Nov. 10, 1931. I L. s. PETERSEN 1,830,959

ROTARY KILN AND COOLER Filed Feb. '7, 1928 anvemboz Patented Nov. 10, 1931 1 UNITED STATES P TEN OFFICE LOUIS s'rnrrnn rnrnnsnn, on NEW YORK, N. Y., assrenon T0 L. smnrn & 00., on

NEW YORK, N. Y., A. CORPORATION OF NEW JERSEY ROTARY KILN ANnoooLnn Application filed February 7,1928. Serial naasasa i.

This invention relates to rotary kilns and coolers employed in the production of cement clinker and in which the clinker formed in the kiln is discharged from the clinkering zone of the kiln into the several drumsof a circumferential series of cooling drums which are supported about the periphery of the kiln and revolve with the kiln. The clinker is partially cooled in its passage through these cooling drums and is discharged therefrom into aconveyor by which it is delivered to the grinding mills or elsewhere. Heretofore the clinker has been discharged from each drum at or near the lowest point in its revolution into a hopper below such lowest point, from which it moves by gravity through a chute to the conveyor. This old arrangementhas necessitated the provision of a pit, upwards of twenty feet in depth, under the discharge end of the kiln, involving expense in its construction and incidentally, since the conveyor is at the bottom of the pit, considerable additional expense in the provision of means for the handling of the clinker and in the operation of such means. The present invention has for its object to make unnecessary the provision of such a' pit as that referred to and to enable the conveyor to be placed at a much higherelevation in relation to the kiln and the cooling drums, thereby avoiding the considerable expense incident to the location of the conveyor at the bottom of a deep pit. In accordance with the invention each cooling drum is provided with a discharge spout of such character as described hereinafter, that the clinker will be discharged from each cooling drum at or near the highest point in its revolutionabout the axis of the kiln into a chute by which it is conducted to the conveyor which can be placed at a level materiallyhigher in relation to the kiln than heretofore and arranged to move ina direction either parallel with theaxis of the kiln or transverse thereto. The invention will be more fully explained hereinafter with reference to the accompanying drawings in which several embodiments of the invention are illustrated and in which:

Figure 1 is a view in end elevation, mainly in outline, of a kiln, its cooling drums and associated devices constructed and arranged in accordance with the invention.

Figure 2 is a view of the same in side eleva tion and partly in section.

f Figures 3 and tare detail views on a larger scale in side elevation and end elevation, re-

. spectively, ofthe end portion of one of the cooling drums shown in Figures 1 and'2 with its discharge spout.

the usual manner for rotation about its lonferential series of cooling drums b which revolve abouttheaxis of the kiln in thefrotation thereof. These cooling drums are supported and operated in the usual manner, not necessary to be described herein, communicating at one end with the interior of the kiln, as indiare parallel, the clinker which is received from the kiln by each drum when the drum In the embodiments of the invention illustrated in the drawings the kiln a, which may be of usual construction and supported in gitudinal axis, hassecured thereto a circumisnear the lowest point of .its movement,

" moves longitudinally in each drum toward the other end of the drurnv In the operation of rotary kilns and coolers of the type indi cated, the cooled clinker passed fromthe open discharge end of the drum, when the I drum'was at the lowest point of its revolution, falling through a chute by which it was conductedto a conveyor or elsewhere. This arrangement,- as hereinbefore ointed'out,,requires the provision of a; pit elow the cooling drums. To obviate thenecessity of pro- .viding such a pit each cooling drum 7),- mac cordance with the present lnvention, is. provided-with adelivery spoutiwhichis so constructed and arranged as to discharge the clinker at a point approximately at or, above the level of the kilnaxis, into a chute which 395 conducts it to a conveyor orelsewhere as may bedesired.

In the constructionshownin Figures 1 to l, each drum b'has ,atits discharge end an opening 6 through which the clinker isde- 32 livered into a receptacle 6 which forms a part of a delivery spout 6*. The receptacle 6 conforms generally to the curvature of the drum and each drum is so placed that the clinker passes into the receptacle when the drum is at or near the lowest point in its movement.

The spout b is laterally directed, being in this instance directedtoward the axis of the cooling drum anddischarging the clinker laterally toward or across the axis of the drum. Within the drum maybe placed a flight or guide plate 6, obliquely disposed, which serves to feed the clinker forward in the drum, into the receptacle 6 and into the spout b as the position of thedrum and the flight changes in'the revolution of the drum about the axis of the kiln. Adjacent to the end of the kiln a and the ends of the cooling drums as they revolve with thedrum is placed a chute c in such position that it will receive the clinker from the delivery spouts of the drums as the drums pass above the level of the axis of the kiln and the delivery spouts assume an inclination from thehorizontal, as shown in the upper right-hand'portion of Figure 1, so that the clinker, which, in the revolution of each drum beyond its high point, has reached the receptacle and the spout, will be discharged into the transverse chute c from which it may be conducted through a chute c to aconveyOr d. It will be seen that by this construction and arrangement the conveyor may he placed substantially at the level of the furnace floor instead of having to be placed, as heretofore, in a pit formed below the kiln and the cooling drums.

It will be observed that in the construction shown in the Figures 1 to l the direction of rotation of the kiln is indicated as counter-clockwise, the spout'of each cooling drum discharging into the chute c as the drum passes above the level of the kiln axis and the spout assumes an inclination toward the chute.

It will be understood thatvarious changes in detail of construction and arrangement may be made-to suit different conditions of use and except aspointed out in the accompanying claim the invention is not restricted to the particular construction and arrangement shown and described herein;

I claim as my invention:

The combination of a rotarykiln for the manufacture of cement and the like, a circumferential series of drums mounted to rotate 'with the kiln, each of said drums cornmunicating at one end with the interior of the kiln to receive the clinker therefrom and being adapted to discharge the cooled clinker at the other end, a spout carried by eachdrum at its dischargeend and external thereto to receive the clinker from the drum, said spout being directed toward the axis of the kiln to discharge the clinker toward the axis of the kiln, and a chute disposed within the circle of the spouts to receive the clinker from the spouts in succession as each spout reaches its highest point, the chute being directed downwardly and outwardly.

This specification signed this 6th day of February, A. D. 1928.

LOUIS VSTEFFEN PETERSEN. 

